Malicious PDF — malware analysis report

Static analysis result for SHA-256 38c881535a0a77e7…

MALICIOUS

PDF

43.8 KB Created: 2020-08-14 17:46:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3f1e02ab13944d6028933680aafc468d SHA-1: 137897b6b3eb115bec630d7775ffb38aefd07504 SHA-256: 38c881535a0a77e7dd0bcb3f0eab13e64add9c428508d841bbbaf26ba64882d3
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a mass of external links, a common tactic for SEO poisoning and redirecting users to malicious sites. One critical heuristic identified a link to a known malicious redirector infrastructure at 'https://ttraff.cc/pify?keyword=boating+marine+lakes+apk'. The document body also contains this URL and a link to a PDF hosted on Shopify, suggesting a lure to download potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/pify?keyword=boating+marine+lakes+apk In PDF document text
    • http://files.stevensonpto.com/uploads/1/3/0/7/130776327/logobov.pdfIn PDF document text
    • http://files.mauriceshapero.com/uploads/1/3/2/6/132681201/jobov.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mevadijuxirefasu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0505/8976/files/91710225869.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4951/6199/files/advantage_max_3_bula.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4929/5776/files/jeturirisubatavedexakez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9714/6019/files/sujosofavotodilogobu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5962/6655/files/circulatory_system_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7789/2251/files/cub_scout_knots.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/mazasalekisupivujimesuzap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7813/9556/files/lesson_plan_about_adjectives.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9201/7305/files/pimajoforo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8030/3270/files/applied_psychology_in_human_resource_management_cascio.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 6

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B65 5252 bytes
SHA-256: 5f701f5b87846900626fe4fa3364394c15adf0ce733299c35b54cce6f69a9ea7
font_01_sfnt_off00007d29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D29 10968 bytes
SHA-256: 2dae1c8bdc9d8cb13fe11e223ea6e662671366bf265325e124f67f159414b707

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